I am so sorry for your loss! I would not feel bad about getting another dog. It could never be a replacement of Lucy, just a new chapter in your life. Lucy will always hold a special place in your heart. I am a firm believer in owning pets. I have 2 dogs (Scooby and Gizmo), 2 cats (Cookie and Pus), 2 bearded dragon lizards (Spike and Ike), and a tree frog (Kermit). They say that people that have pets live longer. So go for it!!!